June
Plant window boxes. Prune spring flowering shrubs once they have finished blooming. Thin seedlings.
Use balanced, organic fertilizers around flowers. Fertilize annuals with liquid fertilizer to promote continuous blooming.
Stake tall perennials and tomatoes. Use pine needle mulch for blueberries.
Be sure the lawn mower is set to cut the grass high.
Divide iris' when they are done blooming.
Plant gladiolus corms.
Dead-head spent plant and shrub flowers.
Remove rhubarb seed stalks as they form.
Cut back perennials such as dianthus, veronica and other similar shrubby varieties, to will possibly produce a second bloom.
You can make softwood cuttings of shrubs this month through July. You may still plant container grown shrubs.
Plant broccoli seed for fall harvest.
Move house plants outside to a shady, protected spot and lightly feed with half strength fertilizer. Mulch perennials and roses to keep down weeds and conserve moisture.
Lookout for Japanese beetles either early or late in the day and shake them into a bucket of soapy water. Put annuals outside. Move amaryllis outside.
Pinch leading stems of chrysanthemums to encourage bushiness and blossoms. Do this every 6 inches as they grow.
Spray the Natural insect repellant to control apple maggot flies. Stop cutting asparagus when new spears get pinkie-finger thin. Let them grow into ferns.
Order autumn bulbs.